The Shun Knife Care Kit has all the tools to help maintain your Shun blades in their best condition. You will be able to deal with natural tarnishing, discoloration and even surface rust. Of course, preventative maintenance is best and you can do that by using proper cutting technique on an appropriate surface and washing and drying thoroughly after use. This kit provides a selection of tools designed to help remove those little spots than can develop, even with the best of care.